JPH11239236A - Image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reader small in size at lower cost by simplifying film loading to the reader. SOLUTION: When a lamp 52 lights a film 18 in this image reader, an image on the lighted film 18 is read by a line image sensor 38 placed in the main body. Furthermore, the lamp 52 is placed to a cover supported turnably to the main body. At holding position the film 18 is held between the cover and the main body, and at release position the film 18 is released. While the cover is set to the holding position, the lamp 52 and the line image sensor 38 are moved in parallel with the film 18 to scan the film 18 by an instruction from a control section 55.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus for reading an image on a photographic film and transmitting it as an image signal to a computer or the like.

[0002]

2. Description of the Related Art A conventional flatbed type image scanner has a wide document placing surface, and can easily read an image simply by placing sheet documents of various sizes on the document placing surface. FIG. 14 is a diagram showing an outline of an example of a conventional flatbed image scanner.

In FIG. 14, when reading a transparent original such as a film, the original 2 is placed on the placing surface on the main body 1 and the cover 3 is closed in this state. Then, the illumination unit 5 having the illumination fluorescent lamp 4 provided in the cover 3 is moved by the feed motor 6 in the cover 2 so as to be synchronized with the sub-scan of the image sensor 9. On the other hand, a reading unit 11 integrally holding a reflecting mirror 7, an imaging lens 8, an image sensor 9, and a fluorescent lamp 10 for illuminating a reflecting original is provided in the main body corresponding to the lighting unit 5.
By driving the motor 12, the sub-scanning is performed in synchronization with the illumination unit 5.

In a conventional film scanner described in, for example, Japanese Patent Application Laid-Open No. 8-149364, a film is mounted on a film holder, and the film holder is mounted on the scanner. The film holder has to be used for each film shape.

[0005]

As described above, when an attempt is made to read a film using a flatbed type scanner, it is very easy to mount the film. However, a dedicated mechanism for driving the illumination fluorescent lamp 5 is required, and there has been a problem that the apparatus becomes large in size.

[0006] Further, in the film scanner, since a dedicated holder corresponding to the shape of the film must be used, there is a problem that the mounting is troublesome. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and makes it possible to simplify mounting of a film as in a flatbed type scanner, and share a part of an illumination driving mechanism and a sub-scanning mechanism of an image sensor to reduce the size of the apparatus. It is an object of the present invention to provide an image reading apparatus capable of realizing cost reduction and cost reduction.

[0007]

That is, according to the present invention, there is provided an image reading apparatus for reading an image on a transparent original and converting the image into a digital signal, illuminating means for illuminating the original, and illuminated by the illuminating means. Imaging means for reading an image on the document, a main body provided with the imaging means, and illuminating means provided; and a holding position for holding the document between the main body and the document. A lid portion rotatably supported with respect to the main body portion at an attach / detach position to be attachable / detachable, and in a state where the lid portion is at the holding position, the illumination unit and the image pickup unit are both attached to the original Scanning drive means for performing a parallel movement to scan the document surface.

The present invention also provides illumination means for emitting illumination light for illuminating a document, one-dimensional imaging means for converting an image on a transmission type document illuminated by the illumination means into an electric image signal and reading the image. In an image reading apparatus having a scanning mechanism for scanning the original by moving the imaging unit and the illuminating unit, the illuminating unit and the imaging unit are held at a holding position facing each other with respect to the original. And a rotation function of rotating around an axis to an attachment / detachment position where the document can be attached / detached, and scanning the document surface by moving the illumination unit and the imaging unit integrally in the axial direction. And a supporting means having a shaft member for supporting the illumination means and the imaging means so as to have a scanning movement function to perform.

According to the present invention, an image on a transparent original is read,
When the document is illuminated by the illuminating means in the image reading apparatus that converts the signal into a digital signal, the image on the illuminated document is read by the imaging means provided in the main body. The illumination means is provided on a lid portion rotatably supported by the main body portion. The lid is rotatably supported with respect to the main body at a holding position for holding the original between the main body and a detachable position for attaching and detaching the original. Then, in a state where the lid is at the holding position, the illumination unit and the imaging unit are moved in parallel with respect to the document by the scanning driving unit, and scanning on the document surface is performed.

Further, in the image reading apparatus of the present invention, the original is illuminated by the illuminating means, and the illuminated image on the transmissive original is converted into an electric image signal by the one-dimensional imaging means and read. The original is scanned by moving the imaging unit and the illumination unit by a scanning mechanism.
The illuminating means and the imaging means are pivotally moved around a shaft by a rotation function to a holding position facing the original and to an attaching / detaching position at which the original can be attached / detached. It is moved integrally in the axial direction. The rotation function and the scanning movement function are performed by a support unit having a shaft member that supports the illumination unit and the imaging unit.

In the image reading apparatus of the present invention, a guide shaft for movably supporting the reading unit and the illumination unit is arranged coaxially with the hinge portion of the lid, and the single common guide shaft is used to connect the reading unit to the reading unit. Both lighting units can be supported.

Further, a reading unit and an illumination unit are connected by one.
In order to drive with one motor, a screw is provided on the common guide shaft, and the reading unit and the illumination unit can be driven by the common guide shaft. In addition, 1
Connect the reading unit and the lighting unit with this wire,
The reading unit and the illumination unit can be driven by these wires. Therefore, the number of parts can be reduced and space can be effectively used, and even a flatbed scanner can be reduced in size and cost. Also,
By driving the reading unit and the illumination unit by one motor, cost reduction can be achieved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of a film scanner according to the image reading apparatus of the present invention will be described with reference to FIGS.

FIG. 1 is a block diagram showing a control system of the film scanner. FIG. 2 is an external perspective view of the film scanner.
FIG. 3 shows an internal mechanism of the film scanner, and is a perspective view of a reading unit, an illumination unit, and peripheral portions thereof.
4A is a cross-sectional view showing the first state of the reading unit along the line CC 'in FIG. 3, FIG. 4B is a vertical cross-sectional view showing the second state of the reading unit, and FIG. 5A is a sectional view showing a second state of the reading unit along the line CC 'in FIG. 3, FIG. 5B is a vertical sectional view showing the second state of the reading unit, and FIG. 6 is a flowchart illustrating an operation of the film scanner.

The main body 15 has a built-in reading unit, which will be described later, and has an original mounting surface 16 on its upper surface for mounting an original. The original placing surface 16 is formed of a transparent flat glass plate. Indices 17a to 17d serving as references when a document is placed are provided around the document placing surface 16 of the main body 15.

In FIG. 2, a range indicated by A is a range (narrow range) that can be read in a first state described later, and a range indicated by B is a range that can be read in a second state described later. Is the range (wide range) that can be achieved. When a narrow document, for example, a 35 mm film 18 is placed on the document placing surface 16, the document is placed so as to fall within the range A, as shown in FIG. On the other hand, a wide original such as 4
When the × 5 inch film 19 is placed, the range B
It is placed so that it enters.

The main body 15 has ends 20a and 20b.
And a central portion 20 in which a part of a sub-scanning mechanism to be described later is incorporated.
c, the lid 21
And openable and closable. An illumination unit for illuminating a transparent original, which will be described later, is built in the lid 21.

A cover glass 22 made of a transparent glass plate is provided on the cover 21 at a position facing the original placing surface 16 of the main body 15 when the cover 21 is closed. ing. By closing the lid 21, the original on the original placing surface 16 is pinched, and the flatness of the original is ensured.

Next, the internal mechanism of the film scanner will be described. Reading unit 25 and lighting unit 2
6 is supported on the first screw shaft 28 by supporting portions 25a and 26a, respectively. Reading unit 2
The fifth support portion 25 a is screwed with the first screw shaft 28 and is rotatably supported by the main body 15.

The first screw shaft 28 is driven by a stepping motor 30 via a planetary gear mechanism 29. The output of the stepping motor 30 decelerated by the planetary gear mechanism 29 is transmitted to the first screw shaft 28. The first screw shaft 28 and the stepping motor 30 are disposed coaxially with the ends 20a and 20b and the center 20c of the hinge 20.

The reading unit 25 is fixed to the main body 15 by a first guide shaft 31. Similarly, the optical unit 26 includes a second guide shaft 32
To the lid 21.

In the reading unit 25, there is provided a reading holder 35 movable in a direction orthogonal to the above-described first screw shaft 28. Read holder 35
Is a line image sensor 38 in the reading unit 25.
Are slidably held in the pixel column direction. The first position detection sensor 36 fixed to the reading unit 25 detects that the reading holder 35 exists at the first position. Further, the second position detection sensor 37 fixed to the reading unit 25 is for detecting that the reading holder 35 is at the second position.

In the reading holder 35, a line image sensor 38 and a reflection mirror 41 are held. Also,
The imaging lenses 39 and 40 constituting the zoom lens are fitted and held in the reading holder 35 so as to be slidable in the optical axis direction, and the magnification of the lens changes by moving in the optical axis direction. I do. Imaging lens projections 39a, 40
a engages with cam grooves 43 and 44 formed in the reading unit 25.

The reading holder 35 is screwed with a second screw shaft 42, and can be moved in a predetermined direction by rotating the second screw shaft 42.
The second screw shaft 42 is driven by a motor 50 via gears 47 and 48. The gear 47 is fixed to the second screw shaft 42, and the gear 48 is fixed to the output shaft of the motor 50.

The detection of the position of such a reading holder 35,
The movement is controlled by an instruction from the control unit 55 shown in FIG. The reading unit 35 is the reading unit 2
When moved within 5, the imaging lenses 39 and 40 are moved along the cam grooves 43 and 44 in the optical axis direction. Therefore, the reading holder 35 is moved in the reading unit 25 to perform magnification, and the reading range is changed. For example, the reading holder 35 is shown in FIGS.
When it exists at the first position shown in (1), the reading range becomes the range A (see FIG. 2), which is the first state. Then, the reading holder 35 is moved to the position shown in FIGS.
When it exists at the second position shown in (1), the reading range becomes the range B (see FIG. 2), which is the second state.

The reading unit 25 is supported by a first screw shaft 28 and a first guide shaft 31.
It is movable in a direction orthogonal to the pixel rows of the line image sensor 38. Since the reading unit 25 is screwed with the first screw shaft 28, the first screw shaft 28 can move the line image sensor 38 to perform sub-scanning when reading an image. The control of the movement of the reading unit 25 is performed by the control unit 55.

The output of the line image sensor 38 is supplied to an external host computer 56 via an image processing section 54. On the other hand, the lighting unit 26 has a lamp 52 for lighting inside,
Supported by the screw shaft 28 and the second guide shaft 32, and is movable in a direction orthogonal to the pixel columns of the line image sensor 38. This lighting unit 26 has a first
Is not screwed with the screw shaft 28.

The movement of the illumination unit 26 is performed by the reading unit 25. The compression spring 51 is for applying the illumination unit 26 to the reading unit 25. Therefore, by moving the reading unit 25, the lamp holder can be moved integrally.

The illumination lamp 52 is for illuminating the film, and is composed of a rod-shaped fluorescent lamp for illuminating a linear range. The illumination range corresponds to the reading range B (see FIG. 2).

As described above, the second guide shaft 32 is fixed to the housing of the lid 21. When the lid 21 is opened and closed, the illumination unit 26 is turned on by the first screw shaft 28. Move around to rotate. But,
Since the first screw shaft 28 and the hinge 20 of the lid 21 are coaxial, the lighting unit 26 can move integrally with the lid 21.

The lighting control of the illumination lamp 52 is performed by the control unit 55. Next, an operation of reading an image in the thus configured film scanner will be described.

First, the film is indexed by the user.
The document is placed on the document placing surface 16 with reference to a to 17d.
When the lid 21 is closed with respect to the main body 15, the warped film is corrected to a flat surface. Then
The user determines whether the reading range is to be a narrow “range A” or a wide “range B”, and the host computer 56 issues an instruction to the film scanner.

Then, the motor 50 is driven by the control unit 55 based on an instruction from the host computer 56. Then, in the case of “range A”, the reading holder 35 is moved to the first position, or in the case of “range B”, the reading holder 35 is moved to the second position. With the movement of the reading holder 35, the zoom lens 3
9 and 40 are moved to change the magnification (step S).
1).

When the reading holder 35 is in the first position, that is, in the first state, an image in the range A is formed so as to effectively use all the pixels of the line image sensor 38. When the reading holder 35 is in the second position, that is, in the second state, an image in the range B is formed so as to effectively use all the pixels of the line image sensor 38.

When the setting of the reading range is completed, an image reading is instructed from the host computer 56 (step S2). Based on an instruction from the host computer 56, the control unit 55 starts reading data from the line image sensor 38, and at the same time, drives the stepping motor 30 to perform sub-scanning (step S3).

The image data thus read is amplified and digitized by the image processing section 54 (step S4,
S5), transmitted to the host computer 56 (step S6). The timing of data transmission may be sent collectively after the entire read range is read, or may be sent every time one line is read.

Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 7 shows an internal mechanism of the film scanner according to the second embodiment, and is a perspective view of a reading unit, an illumination unit, and peripheral portions thereof. FIG. 8 is a view showing a fitting portion between the reading unit and the illumination unit as viewed from the direction of arrow D in FIG. 7, and FIG. FIG. 10 is a diagram showing an arrangement relationship, and FIG. 10 is a diagram showing an engagement relationship between a motor, a drive pulley, and a main shaft.

In FIG. 7, the reading unit 60 and the illumination unit 61 are arranged at opposing positions. still,
The internal structure of the reading unit and the like in the reading unit 60 is as follows.
The description is omitted because it is the same as that of the first embodiment.

The reading unit 60 includes the main shaft 6
2 and the first guide shaft 63, and can be moved in a direction orthogonal to a pixel column of a line image sensor (not shown) in the reading unit 60. Similarly, the illumination unit 61 is supported by the main shaft 62 and the second guide shaft 64, and is movable in a direction orthogonal to the pixel columns of the line image sensor (not shown) in the reading unit 60.

The main shaft 62 and the reading unit 6
A spring 69 is arranged at the fitting portion of the lighting unit 61 and the lighting unit 61. That is, as shown in FIG. 8, a spring 69 is inserted and arranged between the support unit 60a of the reading unit 60 and the illumination unit 61 so as to maintain their positions. The position of the spring 69 may be inserted between the support unit 60b of the reading unit 60 and the illumination unit 61.

At both ends of the main shaft 62, a drive pulley 65 and a guide pulley 66 are arranged, and a wire 67 is stretched over each pulley. One end of the wire 67 is fixed to the reading unit 60, and the other end is fixed to the illumination unit 61.

The main shaft 62 has a hollow shape, and a part of a wire 67 stretched between the drive pulley 65 and the guide pulley 66 is inserted through the main shaft 62.

The drive pulley 65 is connected to a motor 68 and a speed reducer (not shown). When the motor 68 is driven, the wire 67 wound around the drive pulley 65 moves by friction, and the reading unit 60 or the illumination unit 61 is pulled. As a result, one of the units is moved in a direction orthogonal to the pixel column of the line image sensor (not shown). The other unit not pulled by the wire 67 moves following the one unit pulled by the wire 67.

In this manner, the reading unit 60 and the illumination unit 61 can move integrally in the same direction, so that the document can be read. Next, opening and closing of the lid of the film scanner according to the second embodiment will be described.

The hinge of the main shaft 62 and the lid (not shown) are common, and the lid can be opened and closed about the main shaft 62. The illumination unit 61 and the drive pulley 65 arranged on the lid side are also rotatable about the main shaft 62 integrally with the lid.

As shown in FIG. 10, a support member 70 for supporting the drive pulley 65 is provided at the pulley arrangement portion, and is rotatably attached to the main shaft 62. The supporting member 70 includes a wire 6
7 so that one end thereof can be inserted through the main shaft 62.
A drive pulley 65 is rotatably supported. As a result, it is possible to open and close the lid without applying extra stress to the wire 67.

Further, adjustment at the time of assembly will be described.
By moving the guide pulley 66 or the drive pulley 65 and the motor 68 in the thrust direction of the main shaft 62, the relative positions of the illumination unit 61 and the reading unit 60 can be easily changed. By this operation, the amount of light incident on a line image sensor (not shown) can be adjusted.

With the above configuration, the object of the present invention can be achieved, and the present invention can be implemented with a simple configuration without using complicated components such as a lead screw. Further, the adjustment of the amount of illumination light during assembly is facilitated. Further, by increasing the number of guide pulleys, the wire can be freely crawled and the layout of the power transmission system can be improved.

Next, a third embodiment of the present invention will be described. FIG. 11 is a perspective view showing an internal mechanism of a film scanner according to a third embodiment of the present invention. FIG. 12 shows a fitting portion between the reading unit and the illumination unit viewed from the direction of arrow F in FIG. FIG.

Reading unit 73 and illumination unit 74
Are arranged at opposing positions. Reading unit 7
Reference numeral 4 is supported by a main shaft 75 and a first guide shaft 76, and is movable in a direction orthogonal to a pixel column of a line image sensor (not shown) incorporated in the reading unit 73. Similarly, the lighting unit 74 also includes a main shaft 75 and a second guide shaft 77.
, And is movable in a direction orthogonal to a pixel column of a line image sensor (not shown) in the reading unit 73.

The main shaft 75 and the reading unit 7
A spring 88 is disposed at a fitting portion between the lighting unit 74 and the lighting unit 74. That is, as shown in FIG. 12, a spring 88 is inserted and arranged between the support portion 73a of the reading unit 73 and the illumination unit 74 so as to maintain their positions. Note that the position of the spring 88 may be inserted between the support unit 73b of the reading unit 73 and the illumination unit 74.

At one end of the main shaft 75, a drive pulley 79 is provided coaxially integrally with the main shaft 75. Also, at the other end of the main shaft 75,
A motor 86 as a driving source and a planetary gear 87 for reducing and transmitting the driving force of the motor 86 are provided coaxially.

A wire 85 is wound around the drive pulley 79, and one end of the wire 85 is fixed to the illumination unit 74 via a guide pulley 80. The other end of the wire 85 is fixed to the reading unit 73 via guide pulleys 81, 82, and 83.

Here, when the motor 86 is driven, the power reduced by the planetary gear 87 rotates the main shaft 75, and the drive pulley 79 integrated with the main shaft 75 is rotated. Due to this rotation, the wire 85 wound around the drive pulley 79
Is moved by friction, and the reading unit 73 or the lighting unit 74 is pulled.

As a result, one of the units is moved in a direction orthogonal to the pixel row of the line image sensor (not shown). The other unit that is not pulled by the wire 85 will move following the one unit that is pulled by the wire 85.

In this way, the reading unit 73 and the illumination unit 74 can move integrally in the same direction, and the reading of the original becomes possible. Next, the opening and closing of the main body and the lid will be described.

The main shaft 75 is coaxial with the hinges of the main body and the lid (not shown), so that the lid can be opened and closed about the main shaft 75. The illumination unit 74 and the guide pulley 80 arranged on the lid side also rotate about the main shaft 75 integrally with the lid. At this time, since the wire 85 wound around the drive pulley 79 is released from the drive pulley 79, no extra stress is applied to the wire 85.

Next, the adjustment at the time of assembling the film scanner according to the third embodiment will be described. The relative position between the illumination unit 74 and the reading unit 73 can be easily changed by shifting any position of the guide pulleys 80, 81, 82, 83 in the radial direction. By this operation, the amount of light incident on the line image sensor can be adjusted.

With the above structure, the object of the present invention can be achieved, and a component having a large volume, such as a motor, can be arranged at the hinge portion of the main body, so that space can be saved. In addition, adjustment during assembly is facilitated. Of course, the third embodiment does not impair the effects of the above-described second embodiment.

Next, a fourth embodiment of the present invention will be described. The fourth embodiment is an example in which the reading unit and the illumination unit are supported by different shafts, and only the drive motor is used in common.

FIG. 13 is a perspective view of the internal mechanism of the film scanner according to the fourth embodiment. In FIG. 13, a reading unit 91 is fixed to a first screw shaft 92 for sub-scanning the reading unit 91, and a guide shaft 93 supporting the reading unit 91.
Supported by On the other hand, the lighting unit 94 includes a second screw shaft 95 for moving the lighting unit 94.
, And supported by a guide shaft 96.

Then, the first screw shaft 92 and the second
The gears 97 and 98 are integrally provided on the screw shaft 95. Further, these gears 97 and 98 mesh with a planetary gear mechanism 99 for reducing the output of the drive motor 100.

The driving force of the driving motor 100 is transmitted from the planetary gear mechanism to a gear 97 provided integrally with the first screw shaft 92 and a gear 98 provided integrally with the second screw shaft 95. . Therefore, the reading unit 91 and the illumination unit 94 can be simultaneously driven by one driving motor 100.

The planetary gear mechanism 99 and the drive motor 1
If 00 is disposed at the position of the central portion 20c coaxial with the hinge portion 20 shown in FIG. 2, the space can be used without waste.

According to the above-described first to third embodiments, in the flatbed type scanner in which the film is easily mounted, the shafts supporting both the illumination unit and the reading unit are arranged at the hinge part. The support shaft can be shared, and the number of parts can be reduced and the size can be reduced. Further, since the motor for driving the illumination unit and the reading unit is shared, further downsizing and cost reduction of the apparatus can be realized.

Further, according to the second and third embodiments, since the wires are used for transmitting the driving force, the adjustment of the layout of the motor and the illumination position is also facilitated. Further, according to the fourth embodiment, the lighting unit and the reading unit are supported by separate shafts, but the cost is reduced because the lighting unit and the reading unit are driven by one motor. is there.

According to the above embodiment of the present invention, the following configuration can be obtained. (1) It has a main body having imaging means and a lid having illumination means, and relatively opens and closes the main body and the lid to hold a document and an open / close position for attaching / detaching the document. In an image reading apparatus capable of being displaced to and from a position, an image is provided, which comprises a support shaft for supporting a reading holder for holding the imaging means and an optical holder for holding the illumination means so as to be able to move in parallel. Reader.

(2) In the above (1), there is provided a hinge portion for pivotally supporting the lid portion with respect to the main body portion so as to be openable and closable, and the support shaft is coaxial with the hinge portion. An image reading apparatus, comprising:

(3) In the above (2), the support shaft has a spiral groove, and at least one of the optical holder and the reading holder is screwed into the spiral groove to form the support shaft. An image reading apparatus which is driven to move along the axial direction by rotation.

(4) In the above (2), a wire member for connecting the optical holder and the reading holder to each other, and one wire provided in engagement with the wire member and driving the wire member An image reading apparatus comprising: a driving unit.

(5) In the above (4), the upper support shaft is formed in a hollow shape, and a part of the wire member is provided so as to pass through the hollow portion of the support shaft. An image reading apparatus characterized by the above-mentioned.

(6) The image reading apparatus according to (4), wherein the wire driving means is disposed substantially coaxially with the support shaft.

(7) The image reading apparatus according to (5), further comprising a rotary pulley for supporting and guiding the wire member, wherein the pulley is movable in a thrust direction of the support shaft. .

(8) The image reading apparatus according to (6), further comprising a plurality of rotary pulleys for supporting and guiding the wire member, wherein at least one of the pulleys is movable.

(9) There is a main body having imaging means and a lid having illumination means. The main body and the lid are relatively opened and closed to hold the original and a closed position. In an image reading device that can be displaced to an open position for attachment and detachment,
An image reading apparatus, comprising: a drive source that drives a parallel movement of a reading holder that holds the imaging unit and an optical holder that holds the illumination unit.

(10) In an image reading apparatus for reading an image on a transparent original and converting it into a digital signal, an illuminating means for illuminating the original, and an image pickup for reading an image on the original illuminated by the illuminating means Means, a main body in which the imaging means is provided, and a lighting position in which the illuminating means is provided, and further, a holding position for holding the original between the main body and a detachable position for detachably attaching the original. A cover rotatably supported with respect to the main body, and in a state where the cover is in the holding position, the illuminating means and the imaging means are moved in parallel with respect to the document so that the document surface An image reading apparatus comprising: a scan driving unit that performs upper scanning.

(11) In the above (10), a first drive shaft provided in the scanning drive means for driving the imaging means to scan and move, and a second drive shaft for driving the lid to scan and move. An image reading apparatus comprising: a single driving source that applies driving force to the first and second driving shafts.

(12) In the above (11), the second drive shaft may further support the lid so as to be rotatable with respect to the main body at the holding position and the attaching / detaching position. Characteristic image reading device.

(13) In an image reading apparatus for reading an image on a transparent original and converting the image into a digital signal, an illuminating means for illuminating the original and an image pickup for reading an image on the original illuminated by the illuminating means Means, a reading unit provided with the image pickup means, a lighting unit provided with the lighting means, and a first guide for guiding the reading unit so as to be able to move parallel to the document along the axial direction. A guide shaft, a first drive shaft provided parallel to the first guide shaft and supporting the reading unit movably in the axial direction, and the illumination unit parallel to the document along the axial direction. A second guide shaft for movably guiding the illumination unit, and a reading unit for reading the illumination unit between the reading unit and a holding position for holding the original between the reading unit and the reading unit; An image reading apparatus, comprising: a second drive shaft rotatably supported on the unit and movable along the axial direction.

(14) In the above (13), the reading unit can be driven in the axial direction by the rotation of the first drive shaft, and the illumination unit is rotated by the rotation of the second drive shaft. In the state that the illumination unit is in the holding position,
By driving the first and second drive shafts, the illumination unit and the reading unit are integrally moved in parallel with the original along the first and second guide axis directions, An image reading apparatus comprising: a scanning drive unit configured to scan the original surface.

(15) In the above (13), the first drive shaft and the second drive shaft are constituted by one common shared shaft, and the illumination unit and / or the reading unit are used. When the illumination unit is in the holding position, the common axis is driven to integrally connect the illumination unit and the reading unit in the first and second guide axis directions. Scanning drive means for performing a scan on the surface of the original by moving the original in parallel along the original.

[0082]

As described above, according to the present invention, the illumination drive mechanism and a part of the sub-scanning mechanism of the image sensor are made common while simplifying the film loading like a flatbed type scanner. It is possible to provide an image reading device capable of realizing size reduction and cost reduction.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a control system of a film scanner according to a first embodiment of a film scanner according to an image reading apparatus of the present invention.

FIG. 2 is a perspective view illustrating a film scanner according to a first embodiment of the present invention, which is an external appearance of the film scanner.

FIG. 3 is a perspective view showing an internal mechanism of the film scanner of FIG. 2 and showing a reading unit, an illumination unit, and peripheral portions thereof.

4A is a cross-sectional view showing a first state of the reading unit along the line CC ′ in FIG. 3, and FIG. 4B is a vertical cross-sectional view showing a second state of the reading unit.

5A is a sectional view showing a second state of the reading unit along the line CC 'in FIG. 3, and FIG. 5B is a vertical sectional view showing the second state of the reading unit.

FIG. 6 is a flowchart illustrating an operation of the film scanner according to the first embodiment.

FIG. 7 is a perspective view showing an internal mechanism of a film scanner according to a second embodiment, and is a perspective view of a reading unit, an illumination unit, and peripheral portions thereof.

8 is a diagram illustrating a fitting portion between the reading unit and the illumination unit as viewed from the direction of arrow D in FIG. 7;

FIG. 9 is a view showing an arrangement relationship between a motor, a drive pulley, and a main shaft as viewed from a direction of an arrow E in FIG. 7;

FIG. 10 is a diagram showing an engagement relationship between a motor, a drive pulley, and a main shaft.

FIG. 11 is a perspective view showing an internal mechanism of a film scanner according to a third embodiment of the present invention.

12 is a diagram illustrating a fitting portion between the reading unit and the illumination unit as viewed from the direction of arrow F in FIG. 11;

FIG. 13 is a perspective view of an internal mechanism of a film scanner according to a fourth embodiment of the present invention.

FIG. 14 is a diagram showing an outline of an example of a conventional flatbed type image scanner.

[Explanation of symbols]

 15 body section, 16 document placement surface, 17a-17d index, 1835mm film, 194x5 inch film, 20 hinge section, 20a, 20b end section, 20c center section, 21 lid section, 22 cover glass, 25 reading Unit, 25a, 26a support, 26 lighting unit, 28 first screw shaft, 29 planetary gear mechanism, 30 stepping motor, 31 first guide shaft, 32 second guide shaft, 35 reading holder, 36 first Position detection sensor, 37 second position detection sensor, 38 line image sensor, 39, 40 imaging lens, 39a, 40a projection, 41 reflection mirror, 42 second screw shaft, 43, 44 cam groove, 47, 48 gear , 50 motor, 52 lamp, 54 image processing unit, 55 control unit, 56 host Computer.

Claims (3)

[Claims] 1. An image reading apparatus for reading an image on a transparent document and converting the image into a digital signal, an illuminating means for illuminating the document, and an imaging means for reading an image on the document illuminated by the illuminating means. And a main body portion in which the imaging means is provided; and a lighting position in which the illuminating means is provided, and further, a holding position for holding the document and a detachable position for detachably attaching the document between the main body portion. A cover rotatably supported with respect to the main body, and in a state where the cover is in the holding position, the illuminating means and the imaging means are moved in parallel with respect to the document so that the An image reading apparatus, comprising: a scan driving unit that performs scanning of (1). A hinge for rotatably supporting the lid with respect to the main body; and a scan driving means, which is disposed coaxially with the hinge, and includes the illumination means and the imaging device. The image reading apparatus according to claim 1, further comprising: a support shaft that supports the unit so as to be able to move in parallel with the document. 3. An illuminating means for emitting illumination light for illuminating the original, a one-dimensional imaging means for converting an image on the transmissive original illuminated by the illuminating means into an electric image signal and reading the same,
In an image reading apparatus having a scanning mechanism for scanning the original by moving the imaging unit and the illuminating unit, the illuminating unit and the imaging unit are held at opposite positions with respect to the original. And a rotation function of rotating around an axis to an attachment / detachment position where the document can be attached / detached, and scanning the document surface by moving the illumination unit and the imaging unit integrally in the axial direction. An image reading apparatus comprising: a support unit having a shaft member that supports the illumination unit and the imaging unit so as to have a scanning movement function to perform.